Current Attempt in Progress A regression model is to be developed for predicting the ability of soil to absorb chemical contaminants. Ten observations have been taken on a soil absorption index (y) and two regressors: x, = amount of extractable iron ore and *2 = amount of bauxite. We wish to fit the model Y = Ap + Aji + /x2 + E. Some necessary quantities are: 1.17991 E-0 -7.30982 E-3 7.30060 E-4 (XX )-' = -7.30982 E-3 7.97990 E-5 -1.23713 E-4 7.30060 E-4 -1.23713 E-4 4.65760 E-4 220 X'y = 36,768 9,965 The total sum of squares for yis 557 = 742.00. (a) Test for significance of regression using a = 0.025. What is the P-value for this test? The regression model v significant at a = 0.025. P-value is (b) Test the hypothesis Ho: By = 0versus H1: By =0 using a = 0.025. What is the P-value for this test? B1 v significant in the model at a = 0.025. P-value is Statistical Tables and Charts